从嵌套数组中获取对象中的值路径

Question

如何获取此嵌套数组中嵌套值的路径：

const categories = [
    {
        name: 'category1',
        subcategories: [
            {
                name: 'category2',
                subcategories: [],
            },
            {
                name: 'category3',
                subcategories: [
                    {
                        name: 'category4',
                        subcategories: [],
                    },
                ],
            },
        ],
    },
    {
        name: 'category5',
        subcategories: [],
    },
];

我需要实现一个函数，它将 return 像这样：

console.log(getCategoryPath(类别, 'category4')); // 应该输出：'/category1/category3/category4'

到目前为止我有：

const getCategoryPath() = (categories, categoryName) {
    if (category.name === categoryName) {
        path = `/${category.name}`;
    } else {
        category.subcategories.find((firstLevelSubcategory) => {
            if (firstLevelSubcategory.name === categoryName) {
                path = `/${firstLevelSubcategory.name}`;
            } else {
                firstLevelSubcategory.subcategories.find(
                    (secondLevelSubcategory) => {
                        if (secondLevelSubcategory.name === categoryName) {
                            path = `/${secondLevelSubcategory.name}`;
                        }
                    }
                );
            }
        });
    }
}

例如，这会打印匹配的类别名称 /category4，但我需要打印该值 /category1/category3/category4.

的整个路径

在这种情况下，我无法识别匹配 categoryName 的 parent/parents。我可以使用递归来解决这个问题吗？如果可以，我该如何应用它？

Answer 1

您可以应用递归：

const categories = [ { name: 'category1', subcategories: [ { name: 'category2', subcategories: [], }, { name: 'category3', subcategories: [ { name: 'category4', subcategories: [], }, ], }, ], }, { name: 'category5', subcategories: [], },];

const getNestedPath=(arr,name)=>{
    for(let item of arr){
        if(item.name===name) return `/${name}`;
        if(item.subcategories) {
            const child = getNestedPath(item.subcategories, name);
            if(child) return `/${item.name}${child}`
        }
    }
};

console.log(getNestedPath(categories, 'category4'));

从嵌套数组中获取对象中的值路径

Get path of value in object from nested array

javascript

arrays

recursion

path